Review of properties of magnetic shape memory (MSM) alloys and MSM actuator designs

2014 Joint IMEKO TC1-TC7-TC13 Symposium: Measurement Science Behind Safety and Security

Gabdullin, N.^1 ; Khan, S.H.^1

City University London, School of Engineering and Mathematical Sciences, Northampton Square, London

EC1V 0HB, United Kingdom^1

关键词: Actuator design;    Energy Harvester;    Fast response;    Large strains;    Long lifetime;    Magnetic shape memory alloys;    MSM devices;    Shape change;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/588/1/012052/pdf
DOI  :  10.1088/1742-6596/588/1/012052

来源: IOP

【 摘 要 】

Magnetic shape memory alloys are a new group of "smart" materials that exhibit large strain of 6-12% when subjected to magnetic fields. This indicates their enormous potential to be used in different electromagnetic (EM) devices such as actuators, sensors, energy harvesters and dampers. Shape change in MSM materials is controlled by magnetic field and doesn't involve phase transformation, allowing it to overcome a number of disadvantages of conventional shape memory alloys (SMAs). MSM devices are capable of producing large force and stroke output in considerably small dimensions. At the same time they can have fast response and potentially very long lifetime. This paper discusses different modern designs and approaches to MSM actuator design with their advantages and disadvantages. An overview on characteristics of MSM alloys is also presented in order to highlight how different properties of the material influence the total output of a device.